16
Operating Instructions
Scale Factors
Pulses Per kilowatt-hour
Watt-hours per pulse
CT Size
(amps)
1P-240
3Y-208
3D-240
3Y-400
3Y-480 3D-480 3Y-600
1P-240
3Y-208
3D-240
3Y-400
3Y-480 3D-480 3Y-600
5 8000.00
4000.00
3465.70
2000.00
2766.571
0.125 0.250 0.289 0.500 0.361
15 2666.67
1333.33
1155.24
666.667
922.190 0.375 0.750 0.866 1.500 1.084
30 1333.33
666.667
577.617
333.333
461.095 0.750 1.500 1.731 3.000 2.169
50 800.000
400.000
346.570
200.000
276.657 1.250 2.500 2.885 5.000 3.615
60 666.667
333.333
288.809
166.667
230.548 1.500 3.000 3.463 6.000 4.338
70 571.429
285.714
247.550
142.857
197.612 1.750 3.500 4.040 7.000 5.060
100 400.000 200.000 173.285 100.000 138.329 2.500 5.000 5.771 10.000 7.229
150 266.667
133.333
115.523 66.667 92.219 3.750 7.500 8.656 15.000 10.844
200 200.000 100.000 86.643 50.000 69.164 5.000 10.000 11.542 20.000 14.458
250 160.000 80.000 69.314 40.000 55.331 6.250 12.500 14.427 25.000 18.073
300 133.333 66.667 57.762 33.333 46.110 7.500 15.000 17.313 30.000 21.688
400 100.000 50.000 43.321 25.000 34.582 10.000 20.000 23.083 40.000 28.917
600 66.667 33.333 28.881 16.667 23.055 15.000 30.000 34.625 60.000 43.375
800 50.000 25.000 21.661 12.500 17.291 20.000 40.000 46.167 80.000 57.833
1000 40.000 20.000 17.329 10.000 13.833 25.000 50.000 57.708 100.00 72.292
1200 33.333 16.667 14.440 8.333 11.527 30.000 60.000 69.250 120.00 86.750
1500 26.667 13.333 11.552 6.667 9.222 37.500 75.000 86.563 150.00 108.438
2000 20.000 10.000 8.664 5.000 6.916 50.000 100.00 115.42 200.00 144.583
3000 13.333 6.667 5.776 3.333 4.611 75.000 150.00 173.13 300.00
216.875
Table 4: Scale Factors
Specifications
Models
Model VAC
phase
to neutral
VAC phase
to phase
Phases Wires
WNA-1P-240-P
115
208–240
1
2 or 3
WNA-3Y-208-P 115 208–240 3
4
WNA-3Y-400-P 230 400
3
4
WNA-3Y-480-P 277 480
3
4
WNA-3Y-600-P 347 600
3
4
WNA-3D-240-P N/A 208–240 3
3
WNA-3D-480-P N/A 480
3
3
Table 5: WattNode Models
Current Transformers
The WattNode uses CTs with integral burden resistors generating 0.333 VAC at rated current. The maximum
allowable current is dependent only on the physical size of the CT, not the rated current. Exceeding the
maximum allowable current may damage CTs.
The accuracy of the split-core CTs is rated as 1% from 10% to 130% of rated current, the phase angle error is
less then or equal to 2 degrees. The accuracy of the toroidal CTs is rated as 1% from 10% to 130% of rated
current, the phase angle error is less than or equal to 1 degree. The following tables show the available split-core
and toroidal CTs. The CT suffix (-yyy) is the rated current.
